Tentukan nilai x yang memenuhi persamaan

Jawaban:

a. (2x-1) = 9

2x = 9+1

2x = 10

x = 10/2

x= 5

atau (2x-1) = -9

2x = -9+1

2x = -8

x = -8/2

x = -4

HP: {–4,5}

B. (x-2) = 6

x = 6+2

x = 8

atau (x-2) = -6

x = -6+2

x = -4

HP: {–4,8}

C. (2x-6) = 8

2x = 8+6

2x = 14

x = 14/2

x = 7

atau (2x-6) = -8

2x = -8+6

2x = -2

x = -2/2

x = -1

HP: {–1,7}